Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df36815689605a6f55f9d903c761cd17352de669da5dde765dcf7864b1fb0575' 
  AND token = 'Xzr1t9FOOh9a0vMu1iS591dC5YV4PHdZC8d3WnvPQKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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