Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92b2d2d67b79547086bdf1effaabbd5abe0b1f6ce116fedbeed3dd45f8d4c4e' 
  AND token = 'Vfw1hqbeC9PAVy4Z67ZTTZ8wsCFWTQjt7IkPCnWs2HU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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