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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9daa7bdd39ce7e17bd6fdd2972187c4c82ff681f651e0f320c1efe67cf02ffce' 
  AND token = 'UXtvmg3uyLK/IicXHOoBHmeTMOByaJ8kV1DUpjAIl3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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