Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '173ad722f807f3321a4a2d41208033d71130874885c0a0651a0912c7c3fee4b9' 
  AND token = 'STK3wlyPR5ynq9Eh2b2zHIcwC6c2FzMrjcHZtVmmZ7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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