SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '844c3f4c396ce476da599af268924f32ed542ce25d87bba8f2373e555b9ca958' 
  AND token = 'aV+SDEhjfChFbZqbX/oTgXAesg3KG6t/Zfi3mILqlwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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