Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1306ac3419427f6809c501727f3980b4fdcbc1c0f32fe80e5ca85650912ef631' 
  AND token = 'CTL695bEL6MkAoF8hAGDgFALrDcqKZdciQkzdd1ifSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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