Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e2ae6e17903109bf14203a577caf3be0f00ea5e7ef114997dd204259708d366' 
  AND token = 'Qwmi/fIGdD1K0FVNiOBvHe+wnpLT+ofr/QROeK/V+sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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