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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a43d6f0f1ae689ad6a85c1476a03461a4e2de08beae3907771872d1b071e9481' 
  AND token = 'kxCxmD2DifxVh19i5/b7ITFXrJL87NWY6boznkeZQfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00329

JSON explain

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