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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0a86e922e060a3937d268b2d20de551e74b9c6073ffe2f1125ce1d6b78574046' 
  AND token = '6BZ/Q2RjuQ8LVUi7b84B7udTTz4/TfcYv5BEge6o4eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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