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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9ba8150b817250ac6d95abf1c2522e93b8161da898698e17f39a7935cb6e871a' 
  AND token = '9+Y8S0hPgFHBZEiMFZ7NNCSCHcApOZX3PZKJtoykaGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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