Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5ca46c620d13111ce562a60dc37edc15541928e381a9aae735b64d8360c99e8' 
  AND token = 'sTCkpnz7MeAJZiWaKS3fdzin2UnmNAhX/DJCjBDenXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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