Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d44f6ae4fa38b8c0a84757c68c280d5e07e3eb87eced4e47c2c8c5f6ca0f0d3' 
  AND token = 'Q1KYQSFjE4YObSXplAlmdFtrUXVVQkLZv1oR5Cf4QHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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