Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fdb7fbf56b5eb466c24d40dfcaa66b37ea5cb1bcaa07faea283f6fbd65de716' 
  AND token = '7Fwa3F3modk7gZNgJcRY7a0/SW+2Lxz0dFxA64Ryns4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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