Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16868534d12f2ddb0cc520a832af3359aa22d662bd62090847983ae4413dd66c' 
  AND token = 'oA2Q0GAG32nGYaqKngE9+C4k4QVQwMjuVLFudhFDnK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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