Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7821ee75822c89f157ea0bc9623a30075daa8e2fcb6443dfa838c22558e13e68' 
  AND token = 'feyF34+J+w3E78KBJNXdaoM2DEOiFQL0q03Q0BuPrQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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