Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '609229d834bb59793435d5b0fd3d7923bf584a271bb436e12100bac8686825eb' 
  AND token = '8cNS2nOrwEAF/7SQL34uN85E2GA8tiiziFtUfVmCl5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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