Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aca90caf36c3f747f76e9c72e8da40b9cb4c0444b44ae833f962ca7852b13e82' 
  AND token = '3+NgdSvjH/eKOmQf6W63UHjIVT08MMrllu+Se/i+m2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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