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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e067c005db4ea7789bfa3713fe41972aef7366e1ba5b37a8e949716e9af17791' 
  AND token = 'fcDo3n0k1vUlqCRFfJIt/qITNXsUzqhbc5uDPra4XXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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