Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48983bf3ebf50b56ada5b647a65899e9adcb01d965cb6e8d6a93125ff1d91bc3' 
  AND token = 'B5uq3dNULeYi7VVa9tANDY3LgP1u89Qiem28BaUC/u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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