Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71f152625e1d0866f6faf1ea2e77ecbe8cfff90fa1638cc22fc1ea31fbb048d7' 
  AND token = 'Cy7MVOhS19Zd+dM/LZ5iLHS8sVbUvfKAqyhQJA18w1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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