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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0150af70c8da0bea4749c5d9836cd50fc2b6183695d204eda4150170e7d42f92' 
  AND token = 'l05jqd7Ghuyi41u++8LN5zrflxB4uXs/kLrfbJIPUu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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