Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e239964e2deb1674629d587278128ca4a1d467d340c097f802cdc241a85c93fb' 
  AND token = 'EBGMHATJEdNEHgDz5ZPwa4zfto5XaMqMElrj3ErVY54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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