Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8da765778fa4ba72263df411b8559c9bd92adea4dd901f0297384b0288764973' 
  AND token = 'dxG11iha13EFX5Ck3wcrQAMGS5wSOcdVWpR2b67Ij8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}