Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '455a1fa973fe80fcbabc37a87906d9f74c293cd6edc5c558618848fec131a5e1' 
  AND token = 'PyQxHWaBw8TFxb7e4HUnMCfAOC1reaE+bujcVaqc3qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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