Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2a6576d4349c9ea245423335d12e7d95ac43b24c44f3f72a03d2f28fdc594b' 
  AND token = 'lj1hvN2Y4eN9Q5xk7W+peQ8Dy2vBZ+xu/SS7fIljE3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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