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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e45ac2a4780a4f9c7bd20d399e1676e5e53e13162bf882dd40186c250b93b5cf' 
  AND token = 'WOdS9ShRDqL+YlNbMvEM4uyra9qw0tz+lDDMKCqoAgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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