Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bf2f7e27547090d49ce8f517e84794e5a93ef11d064af71e49d3df696909321' 
  AND token = '7SAC0DjsVbuL3oQ+wFATcfeLNn1UooTp21tqqyIz7a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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