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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4e65e47419bdd8b4b11f083fe0cef952b5edbe8a6b665210b365f87c9b44fa8e' 
  AND token = 'qTYuUmWvB24r+U4S56Q/JC/z4XugteB4VBYewL/v1o0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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