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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '64a2661e02ee9a69288a534c8c290dc1e9fe6b995577b8bab3e1db3431688ec3' 
  AND token = 'OONTltySiqiEjt3YAmsHloOlWBoXYLZn/SYEdv1sWfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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