Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd83479d41ac924051bb053c47e35eaf173c71d91d8f413c0e848bc8fb30a69b1' 
  AND token = 'uBHkJU1w0Br2mn5+tEFC7bad4jRcgaBu06LuVPoVOEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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