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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0a1dc5adcbc1bc1cfe6ff0e05f54fcefbf6d2b2a868b1fe4bc9cfca77127c795' 
  AND token = 'G1OtIO9S7n9Uj8CePlMBXokafr+vZh9GHc0f4A7xUwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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