Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbe7e332c2a0a3e6e7c58aeb822e3d88fe5ba186dbba9ed15e213ecd3a3afd7d' 
  AND token = 'cFXVS2WY1THF/bV8LZFJtP53X2tQ0GUp1gTrZiE4I0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}