Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '707d5550bde91f8f81789d4ada6a55d230384caaad4de7951daf7f9ce501a98b' 
  AND token = 'zr0DqAWqkRGe8oEukxDPu+SNJhC82cdG1JTwYOMaJ8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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