Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df9ae8b40044a8f328adde6b653e18acf7e66249fbb4de4340c1beb174b91d3e' 
  AND token = 'ysMSaodF5V5MLilhpEOHCheNjD89/H2DdGFgpM4o4kk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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