Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85c935fc694e149c5053e1f2ae001d150a398f70911d538860660c6c0e5afe11' 
  AND token = '5yfO7gg8HO3MxlLAqtxE7Ehz4vLTX4K6C4sAuzvg9D8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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