Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0ccd2b805911b9083a402e53384d357b4fe15fd5d3e9a97c89e01d3c0417b80' 
  AND token = 'Z0IrsquUIolGNNKywuhGOzg97mkqKP9pmTFe/sruLDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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