Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb91e13f32e7b969c2496fdcfd0f0c077d938239593f12f3ba7548b0f0db8109' 
  AND token = 'w097cucIFFKS8oTuGclxAZj4Omqs67J6f4/zmKzgD+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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