Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '142cd092f2b63778833e1634ac14a2d97ad74bf2a6e2ae9dc3363c918b8f394f' 
  AND token = '75xtfsbijsI2dNkgr5bIJwBC6HvANetNcZYdfBIv61o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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