Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '745d2b3322990699b0440dfed434566f07d35be248f06528399dc0928556c6ef' 
  AND token = 'wee/kmZqkZnS84bRCWi6jooeRmI70KW1rGzf6HrqNYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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