SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96bf66e428579cdfaa7c1367b1b92c287f34e7706346a4e918bce5b535c9bc40' 
  AND token = 'TvXjpUH2VoUje2SnjpuoraE1BGzm+R0VfBC0LagFU4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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