Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a0d8013e712e4ddcfeb5c09fddc2d25d3efc6ae67e73e2543785f8f750965f6' 
  AND token = 'Yy0OZeceOc8nDKLO0RC6IR49M6+TCtybzQHs4gg8fYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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