Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fed17ba69644e2cd8654cc4bc0a7a86c6ee985b90a1504852b4693a63ab83ce' 
  AND token = 'EhE5h+wcfCDELguyST0qlNbcPEtrm5h7cGDBgqmp6KA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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