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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7d111c71e3878499c3dd18067eb9ab8d596c9bdcf48db1bdf7160c79fab04c0' 
  AND token = 'Xwwe+QBwvuT5Wa7RuKqc8jnSaPQaJAod6yXNLEY8R+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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