Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc70d25fa015eae9bf7a60225cecb38e4afda1ba01056d125be03c54085a973d' 
  AND token = 'djZcq2b6tc2XuAs319efalYKaOUqnGHP4mWd5ZiNJrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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