SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b4d132782a5477584a8f646ca80088784bef81fc517eaf75d1d6f7ed7b1b686' 
  AND token = 'aUg7nJ9+moqx0AjBRcKwsTKrBiqA9DP+LA/BAsyfRZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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