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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'aa8632ca0c036a3cb57d02e063cad007c280b205fa296de64872bdc08ad7ded2' 
  AND token = 'n1wzxIavV8VRIZMFIgpJFaSbRnieO8tvvRIQL7D0dUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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