Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '61c56c2a1509445fa76a62d0a58759b16ba9166cddb65300bf3fe36f4a38effa' 
  AND token = 'ewaSxTjRob4M+42es3a2utT26PngrecslwrKDVEznAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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