Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71eac2bdbd35957da000f607da3e5555af4c5489fd480e06946b097caa4bf469' 
  AND token = 'yaNqF/NzacYCwL6nmBkwMS81w/7RGsYqbEtpch21ptk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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