Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebacb4c548b4f470063793d1c724080ffab4d6d00d27ee687e15dd0316ff68c8' 
  AND token = '9acHJB10NvtPsb21u0exrETkz/u3qkpveaMxJuRnUOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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