SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2ae16be829b52f51a4d62d9740e402d04aaca39cb837150394952b7bf00fc8bc' 
  AND token = '7Zb7K/wTOfpXqAB1T0uV1Ky/CJR8HTp1XVbRNyGNF5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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