SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77af63ede07ba25d594442dab486aca49c13cbe1ccd995bcf91feb86cc043ee6' 
  AND token = 'UZXdQmFaJyhZBvJ5vo/KQfy/Gh9eSuIzqpJK6rpRam8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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