Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eed2d2f7c2731fdbb121da02cd5d927cc670faea245b7b311ad7c92e1e3bc9b4' 
  AND token = 'oCWZdKMdWTnKwCVeV9ozc01+QtPyUfB8a2idADObrLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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