Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ec5208abf5106c86157edbd603b88dc56ec265f7413fca90840bd2ef00108da' 
  AND token = 'vc+brNWj5Ma1XDHfE2j8aKg0ZYQwRYg1iCeamBpXGdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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