Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07f8ca4a5e0525c83aac43c94655fd4dcbfa2c46a103d810bbaba938b0c2db1' 
  AND token = 'E1hZNFc14BhJiwovO2j2jj1N79JAAqs62iBACu84Z2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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