SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb0c48a2b6413f09029ab8832a032a15fbeb51d6f5fc9a327af39d7e075b692e' 
  AND token = '9zNqqYbNRlOCg4GVoCFzAO109rUDH588W+h8+wrkAX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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