Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea9996f1e6636fe2d890b979f12db17ae8dd906785fdfd97eaafbee1d81c1991' 
  AND token = 'gdCC/1N2kOUxiTezIo5GlU1041kS58mw41C9KGORmQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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