Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0783cad152a939a4ef562acf7ff2d6bedbd1b7179a40b0e786d289d9bbd2b5a9' 
  AND token = 'ol4sk8kugx3YLZit05LBivKaWeRRpLneEGHjIyMieZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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