Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c5ffbadc5d8f37e73aedfceecfeee603b90367308a51813817a714a781d81d3' 
  AND token = 'CoPLvTBE5j/HShq8yhiUGMwhLk3Pvb6PFXdNMVk4QL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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