Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e973e791968aa78ee799983f50e335364ceb2b7c167fbd6414c6628ad8b14c45' 
  AND token = 'ZjhZzzxboa15MU4STtfMSlmgu8po0oHKTDSxcfbqk3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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