Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc71e52b399af0ab1b30afb9ed29a3b2cfd77cc472973650b72ae738bf6b5c6f' 
  AND token = 'O0IdGmE5WGOmY+4+Sc72WrVys4ekj98yJXF/STIfgfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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