Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5666c791413657b191bd58f025f4762a2ad249c68df0f5db4baceb5a159070ca' 
  AND token = 'GSGp3kZpLR5vO++2ZzNSU6IOr91PP+kTs61D4itReYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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