Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5450d95d8abfcb8abb2e401cca015ed04049d3c2d6095ba0a828dd015920ad7' 
  AND token = 'aSliL2LZizjJiS/5tHtKZ7sftcVjv2YmfJQU4jRg9Yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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