Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1e411002e26a264d702fd08659a30d50ad91886c1713fd5195aa1dd288323f0' 
  AND token = '/TBaBZp3Uo9i9wREiaG1tBrVdwfQBSumxr2FI7Wkr+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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