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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '131ce0c95a6610bb68d52bf2f46e5f6bbe08e5fbdea2d462c3b8b3946a2416b7' 
  AND token = 'immrvjCilfR3cybW2k+zPtOgWbLANrVF0Ui5dwVS/Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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