SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7adf5d478b22979f463f1d856c674731946963d61728addcb7bf1930e480e90c' 
  AND token = '/zjC1V/Xvbr4R9HPGVzyKbziFbVedPnpLGSjlh8hUjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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