Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbaec2a0883bd6a7576fa162ae90dd60ffef7b450ad31bd9e4bfbd5b5698f986' 
  AND token = 'PbNkISSftj2WpGAj2iOprwTAFjqbYuibuF9UYxi2DyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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