Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdeb787fd030e2049dff031b57b7b27dc2a09b0cea6fe0ae40083bb0c80a0602' 
  AND token = 'nS5RPWzrQurDZsrfPUqczzwIRDlbX9l+wNB+uL/iw2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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