Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030f6d3d5947269e8c7f58a083b8accdbb6230e06fd738bae8c7428e7c93d087' 
  AND token = 'd7ykTJr7AN+i3BoDNrsZyFpoJNxMHG2U8bnMO/CPEIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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