Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77ae53e78f67cef10a2cfe3564aaa214481c8d3c64dcee3c8cc0cd7c2ab07afa' 
  AND token = 'Q71qKSuO91jS3egX7fsqzJfqT2XYJMqTJ+yeUBGd5kI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}