SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a0111c7b76b3f33885f2607f48839d2e0fd2103455f55be7bda0329b6369d32' 
  AND token = 'wJuX+fCJniYkzrncqWOx3DvPOB/cLJzOQDRkb6WAi4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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