Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30db5618095c812a26c68a010b15ff05f08a49667e41f6639885048dd1bbeccc' 
  AND token = 'OBgpf4e5d+KnMRo8cA5m4H7OUHzfMKfYm1WjeKoX3ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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