Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78b6821a074e647f390c2cfe260dfa47911557a341182812a76275eb1451bf01' 
  AND token = 'Eciz1jKDqj28VpIOk695FZ/H4JWmpztidZJHyj/tKBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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