Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03e0bbafb23dabffcf9ce20b7d42abda53a7072afbca563783b43bda4c93ad8e' 
  AND token = 'voyvcGxX4j1dGI+Alq96zCvaq/il2DPN1niUmzPELXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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