Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eff4811ab48534c2af72cfc40a86fa023c598c661280f4d99f55c6300be68ae' 
  AND token = 'zRKqWh4fK0ZPQh6vPP9gSb/JEy44UgBO9UO0Q0thXHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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