Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34390719f15213ec37072faf601dfe74000ee2995decb9cab52aee1947c4206a' 
  AND token = '2OxwtqyVvc2WS6OsVaI3K5BaP62IairLuekZu9ggXxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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