Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75bb092e7b947f5accd888448f9510ef8ccf36a193d5d5a7b29341a445809195' 
  AND token = 'CdV+S+AXz8aHCAYCkx43bn4KIGsY5QCn3KkeyNfmZmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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