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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f22a0fefe99a197dbd2db0af1d8322109d112636ba3eacb852ac00acf7130798' 
  AND token = 'tW0JX3Bn4iN3Q3wYa2O24oYpbtkA8pJpB8ak3O4stUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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